/**
 * 收到请求时，把网页响应回去
 * http://localhost:8081
 * 将index.html响应到前端
 */
const http = require("http");
const url = require("url");
const fs = require("fs");
const path = require("path");
const https =require("https");
const cheerio = require("cheerio")

const reqUrl = "https://maoyan.com/films";
var movieList =[];

http.createServer((req,res)=>{
    var urlObj = url.parse(req.url);
    var pathname = urlObj.pathname;
    if(pathname === "/"){
        var filePath = path.join(__dirname,"/index.html");
        fs.readFile(filePath,(err,data)=>{
            if(err){
                console.log(err);
            }
            else{
                res.writeHead(200,{"Content-Tyoe":"text/html;charset=utf8"})
                res.write(data);
                res.end();
            }
        })
    }
    else if(pathname =="/getlist"){
        https.get(reqUrl,(resObj)=>{
            var htmlStr = "";
            resObj.on("data",(chunk)=>{
                htmlStr += chunk;
            });
            resObj.on("end",()=>{
                var $ = cheerio.load(htmlStr);
                $(".movie-item-title a").each((i,el)=>{
                    var movieName = $(el).text();
                    var movieId = $(el).attr("data-val");
                    movieId = movieId.slice(movieId.indexOf(":")+1,-1)
                    var num1 = $(el).parent().next.children(".integer").text();
                    var num2 = $(el).parent().next.children(".fraction").text();
                    var rate = num1+num2;
                    var movieObj ={movieId:movieId,movieName:movieName,movieRate:rate};
                    movieList.push(movieObj);
                })
                res.writeHead(200,{"Content-Type":"text/plain"});
                res.write(JSON.stringify(movieList));
                res.end();
            })
        })
    }
}).listen(8081)